$cos4\theta\:=8sen^4\theta\:-8sen^2\theta\:+1$
$\sqrt{18x^9}$
$\int2x^6e^{-2x}dx$
$\frac{8x^3y^4}{2x^2y^3+2x^2}$
$\left(\frac{3}{4}m^2-\frac{2}{3}n^3\right)^3$
$8x-5\le7x+14$
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